Dry shampoo and related methods

Abstract

This disclosure relates to dry shampoo compositions. In particular, the present disclosure pertains to dry shampoo compositions that are environmentally friendly yet effective. The dry shampoo compositions provided herein may function, in part, by absorbing excess oil and sebum from the scalp and hair, thereby reducing the appearance of greasiness and extending the time between conventional washes.

What is claimed is: 
     
         1 . A dry shampoo composition comprising by weight percent of the total composition:
 about 50 wt % to about 95 wt % dimethyl ether; and   an oil-absorbing component comprising:
 about 2.0 wt % to about 6.0 wt % rice starch, and 
 about 1.0 wt % to about 8.0 wt % potato starch; 
   about 0.05 wt % to about 0.2 wt % silica;   about 1.0 wt % to about 2.0 wt % zeolite; and   about 0.1 wt % to about 0.3 wt % panthenol,   wherein the composition has a combined maximum incremental reactivity (MIR) of less than about 0.75.   
     
     
         2 . The dry shampoo composition of  claim 1 , wherein the silica is present in an amount of about 0.10 wt %. 
     
     
         3 . The dry shampoo composition of  claim 1 , wherein the potato starch is present in an amount of about 1.0 wt % to about 6.0 wt %. 
     
     
         4 . The dry shampoo composition of  claim 3 , wherein the rice starch is modified rice starch comprising cetrimonium chloride. 
     
     
         5 . The dry shampoo composition of  claim 1 , wherein the weight ratio of rice starch to potato starch is from about 1.5:1 to about 2.5:1. 
     
     
         6 . The dry shampoo composition of  claim 1 , wherein the dimethyl ether is present in an amount of about 92.5 wt %. 
     
     
         7 . The dry shampoo composition of  claim 1 , wherein all components have a global warming potential of zero. 
     
     
         8 . The dry shampoo composition of  claim 1 , wherein the composition is free of alcohol, water, smectite clay, hydrophobic emollients, and talc. 
     
     
         9 . The dry shampoo composition of  claim 1 , wherein the composition is contained within a compressed-gas aerosol dispenser. 
     
     
         10 . The dry shampoo composition of  claim 1 , further comprising PVM/MA decadiene crosspolymer in an amount of about 0.01 wt % to about 0.05 wt %. 
     
     
         11 . The dry shampoo composition of  claim 1 , wherein panthenol is included as a conditioning agent to improve combability and shine. 
     
     
         12 . The dry shampoo composition of  claim 1 , wherein the zeolite is in amount of about 1.6 wt %. 
     
     
         13 . A dry shampoo composition comprising by weight percent of the total composition:
 about 55.0 wt % to about 65.0 wt % of dimethyl ether;   about 25.0 wt % to about 35.0 wt % water;   about 0.50 wt % to about 5.0 wt % silica;   about 0.30 wt % to about 0.50 wt % phenoxyethanol and ethylhexylglycerin;   about 0.50 wt % to about 1.0 wt % terpinolene;   about 0.50 wt % to about 2.0 wt % propanediol;   about 0.50 wt % to about 2.0 wt % glycerin; and   about 0.01 wt % to about 0.05 wt % PVM/MA decadiene crosspolymer,   wherein the composition is an aerosol spray having zero global warming potential.   
     
     
         14 . The dry shampoo composition of  claim 13 , wherein the silica is present in an amount of from about 3.0 wt % to about 5.0 wt %. 
     
     
         15 . The dry shampoo composition of  claim 13 , further comprising tetrasodium glutamate diacetate as a chelating agent in an amount of about 0.01 wt % to about 1.0 wt %. 
     
     
         16 . The dry shampoo composition of  claim 13 , further comprising sodium hydroxide to adjust pH to a range of about 6.0 to about 7.5. 
     
     
         17 . The dry shampoo composition of  claim 13 , wherein the composition contains no volatile organic compounds (VOCs). 
     
     
         18 . The dry shampoo composition of  claim 13 , wherein the dry shampoo composition is biodegradable and non-flammable. 
     
     
         19 . A method of refreshing or cleansing hair without water, the method comprising:
 providing a dry shampoo composition; and   dispensing the dry shampoo composition to the scalp or hair of a subject in need thereof to reduce oiliness and refresh the hair without rinsing,   wherein the dry shampoo composition comprises:
 about 50 wt % to about 95 wt % dimethyl ether; and 
 an oil-absorbing component comprising:
 about 2.0 wt % to about 6.0 wt % rice starch, and 
 about 1.0 wt % to about 8.0 wt % potato starch; 
 
 about 0.05 wt % to about 0.2 wt % silica; 
 about 1.0 wt % to about 2.0 wt % zeolite; and 
 about 0.1 wt % to about 0.3 wt % panthenol, 
 wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.75; or 
   wherein the dry shampoo composition comprises:
 about 55.0 wt % to about 65.0 wt % of dimethyl ether; 
 about 25.0 wt % to about 35.0 wt % water; 
 about 0.50 wt % to about 5.0 wt % silica; 
 about 0.30 wt % to about 0.50 wt % phenoxyethanol and ethylhexylglycerin; 
 about 0.50 wt % to about 1.0 wt % terpinolene; 
 about 0.50 wt % to about 2.0 wt % propanediol; 
 about 0.50 wt % to about 2.0 wt % glycerin; and 
 about 0.01 wt % to about 0.05 wt % PVM/MA decadiene crosspolymer, 
 wherein the composition is an aerosol spray having zero global warming potential, and 
 wherein each wt % is based on the total weight of the respective dry shampoo composition. 
   
     
     
         20 . The method of  claim 19 , wherein dispensing the dry shampoo composition comprises spraying the composition from a pressurized container through a spraying device, the spraying device comprising a vapor tap orifice having a diameter of about 0.010 inches to about 0.062 inches, and wherein the composition is dispensed at a rate of about 0.50 g/s to about 2.0 g/s.